| County : | Delaware County |
| State : | Iowa (IA) |
| Land Area : | 577.75 sq mi |
| Water Area : | 1.19 sq mi |
| Latitude : | 42.4730031 |
| Longitude : | -91.3594425 |
| Population (2010): | 17,764 |
| Population Estimate (2012) : | 17,721 |
| Population Density : | 30.75/sq mi |
| Housing Units (2012) : | 8,028 |
| Median Household Income (2012) : | $51,663 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $64,773 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $125,400 (Iowa : $123,000, USA : $181,400) |
Delaware County Cities / Towns
| Colesburg City (404) | Delaware City (159) | Delhi City (460) |
| Dundee City (174) | Dyersville City (4,058) | Earlville City (812) |
| Edgewood City (864) | Greeley City (256) | Hopkinton City (628) |
| Manchester City (5,179) | Masonville City (127) | Ryan City (361) |
Delaware County Zip Codes
| 50654 (499) | 52035 (1,010) | 52038 (491) |
| 52040 (5,526) | 52041 (1,608) | 52042 (1,999) |
| 52050 (515) | 52057 (8,222) | 52065 (1,130) |
| 52076 (2,295) | 52078 (914) | 52218 (1,788) |
| 52223 (1,351) | 52237 (1,522) | 52310 (6,431) |
| 52330 (900) |